#include <stdio.h> 
void printf_star( ) {
    int i = 0, j = 0;
    for (i = 1; i <= 3; i++) {
        for (j = 1; j <= i; j++) {
            putchar('*');
        }
        printf("\n");
    }
}
int main() {
    printf_star();
    return 0;
}